Crown type eccentric multi die press for manufacturing reinforced crown caps and embossed crown caps

ABSTRACT

The “Crown type eccentric multi die press for manufacturing reinforced crown caps and embossed crown caps” consists of a group of parts, most of them mobile and concentric, whose main parts—forming punches—when activated by the press, give form to the reinforced crown caps and/or to the embossed crown caps, in general.

BACKGROUND Field

Pursuant to International Patent Classification, the “CROWN TYPEECCENTRIC MULTI DIE PRESS FOR MANUFACTURING REINFORCED CROWN CAPS ANDEMBOSSED CROWN CAPS” corresponds to:

Section B Various Industrial Techniques; Transport—Transport orMaintenance

B21 MECHANICAL WORK OF METALS WITH NO SUBSTANTIAL RIPPING OF MATERIAL;CUTTING OF MATERIAL BY PUNCHING B21D MECHANICAL WORK OR TREATMENT OFMETAL PLATES, METAL TUBES, BARS OR CONTOURS WITH NO SUBSTANTIAL RIPPINGOF MATERIAL; CUTTING OF MATERIAL BY PUNCHING.

B21D 24/00 Combinations of presses or systems related to presses, forembedding.

BACKGROUND Description of the “Crown Type Eccentric Multi Die Press forManufacturing Reinforced Crown Caps and Embossed Crown Caps”

In state of the art, the Multi die press is called “eccentric doubleeffect press” and includes the following parts:

1. Sheet Feeding System 2. Dies 3. Sheet Exit System 1. Sheet FeedingSystem:

This system transports the printed tinplate sheets to the multi-dieswhich later on will be formed and made into crown caps.

2. Dies:

They include the following parts:

a) Lower System

Table₍₁₂₎: This element holds the lower dies secured by bolts.

Lower holder die₍₆₎: This element holds the “forming die”₍₇₎ (whichforms the caps' corrugations) and the “lower cutting die”₍₅₎ which cutsthe circumference (cut-edge) that will delimit the total development ofthe cap.

In the back part of the Table₍₁₂₎, is a “treader holding bottle”₍₉₎ heldby a screw. This bottle holds the “treader”₍₈₎ whose purpose is toprovide pressure during cutting and embedding.

Moreover, the “treader”₍₈₎ holds the “ejector shaft”₍₁₁₎ that expels thecap once it has been formed.

b) Upper System

Upper cutting die₍₄₎: This element is found attached to the “upperholder die”₍₂₎ and works jointly with the “lower cutting die”₍₅₎ to formthe cap.

The “upper cap forming punch”₍₃₎ moves in the internal part of the“Upper cutting die”₍₄₎, which embeds and determines the inside diameterof the cap. This cap forming punch is joined to the “holder stem of theupper cap forming”₍₁₎.

Cap Forming Process

The lower die system remains steady while the Upper System is activatedby the press crankshaft in an alternate movement. Once each cap isformed, the “ejector shaft”₍₁₁₎ will strip it mechanically and it willdrop by the effect of gravity to a conveyor belt that will lead it to adefective cap separator device. The other caps will be transported to acontainer cart.

3. Processed Sheets Ejection System

The processed sheet or “skeleton” is the residue—or wastage—of theprinted sheet, which will be mechanically ejected into a container, oncethe caps corresponding to the sheet have been formed.

DETAILED DESCRIPTION

The invention is a mechanical device, die designed to specifically workin the currently state of the art CROWN press and to exclusivelymanufacture REINFORCED (LOW GAUGE) CROWN CAPS and EMBOSSED CROWN CAPS ingeneral.

THE REINFORCED LOW GAUGE CROWN CAP is a new crown cap modality whoseoriginal rigidity allows reduction of the thickness of the currentlystate of the art Pry-Off and Twist Off crown caps, from 0.23 and 0.21mm, respectively to 0.18-0.16 mm.

The REINFORCED LOW GAUGE CROWN CAP has currently a “patent pending”status in various countries around the world. Its inventor is the sameperson who invented this innovation. However, the REINFORCED LOW GAUGECROWN CAP cannot be produced with the currently state of the art dies;therefore it requires this utility model for its manufacture.

This invention includes the following parts:

a) Lower System

Table₍₁₂₎: This element holds the lower dies secured by bolts. Lowerholder die₍₆₎: This element holds the “forming die”₍₇₎ (which forms thecaps' corrugations) and the “lower cutting die”₍₅₎ which cuts thecircumference that will delimit the total development of the cap. In theback part of the Table₍₁₂₎, we find the “treader holding bottle”₍₉₎ heldby a screw. This bottle holds the “treader”₍₈₎ whose purpose is toprovide pressure during cutting and embedding.

Moreover, the “treader”₍₈₎ holds the “lower cap forming punch”₍₁₃₎ andthe “ejector shaft”₍₁₁₎ that expels the cap once it has been formed.

b) Upper System

Upper cutting die₍₄₎: This element is attached to the “upper holderdie”₍₂₎ and works jointly with the “lower cutter die”₍₅₎ to form thecap. The “upper cap forming punch”₍₃₎ moves in the internal part of the“upper cutting die”₍₄₎, which embeds and determines the inside diameterof the cap. This cap forming punch is attached to the “holder stem ofthe upper cap forming”₍₁₎.

Cap Forming Process

The Lower Die System remains steady while the Upper System is activatedby the press crankshaft in an alternate movement. Activation of thelower cap forming punch₍₁₃₎ with the upper cap forming punch₍₃₎ willthen provide the cap with the characteristics typical of a Low GaugeCrown Cap, specifically, as a consequence of the concentric ring formedby the activation of these two cap forming punches, and which cannot beachieved if the currently state of the art die is used. For the embossedcap, the required relief will be provided by the previously describedconcept.

Once the low gauge crown cap or the EMBOSSED crown cap is formed, the“ejector shaft”₍₁₁₎ will strip it mechanically and it will drop by theeffect of gravity to a conveyor belt that will lead it to a defectivecap separator device. The other caps will be transported to a containercart.

Description of the Modifications Made in the Crown Type Eccentric MultiDie Press for Manufacturing Reinforced Crown Caps (Low Gauge) andEmbossed Crown Caps

The operation system is similar to that of the currently state of theart caps, mainly substituting various parts regarding the dies in thepreviously mentioned state of the art.

Modifications in the lower die system were made to provide the dies witha rigid support, necessary for the embedding of the ring characteristicto the Low Gauge reinforced crown cap and/or the embossed cap. The firstmodification refers to the inclusion of “lower centering device”₍₁₅₎ inthe “lower holder die”₍₆₎ to restrict lateral tolerances characteristicof this system.

The currently state of the art “forming die”₍₇₎ and “lower cuttingdie”₍₅₎ have not been changed.

The “treader”₍₁₄₎ continues to fulfill its original function in theforming of the cap and at the same time holds the new “lower cap formingpunch”₍₁₃₎, which together with the “upper cap forming punch”₍₃₎ willprovide the concentric ring that shapes the characteristic reinforcedLow Gauge crown cap and/or the characteristic relief of embossed crowncaps in general. The mounting of these parts is similar to those of thecurrently state of the art dies in reference, which are placed insidethe “treader holding bottle”₍₉₎.

On the other hand, the “ejector shaft”₍₁₁₎ has been modified in itslower part with a new “shock absorber system”,₍₁₆₎ to increase the capexpeller force. This is essential because the particular reinforcementring or relief of the Low Gauge reinforced crown and/or embossed capsrequire an additional expulsion force that the current state of the artdies lack.

The “Upper Cap Forming Punch”₍₃₎ has also been modified regarding itscurvature radius (plane) and the inverse cavity of the “Lower Capforming Punch”, in order to obtain the embedding of the ring and/or therelief as the case may be. In the same manner, these cap forming punchescan be also used to produce reinforced Low Gauge crown caps and embossedcrown caps, in general.

Consequently, to manufacture reinforced Low Gauge Crown and/or embossedcrown caps it is necessary to exclusively use the dies that includesthis invention; these dies do not only and exclusively producereinforced Low Gauge crown caps, but also embossed crown caps that arenot necessarily Low Gauge, but have forms and/or logos, marks or badgeswhose purpose is not to provide the crown cap with reinforcement ringsthat will improve its structural performance, but only to givedistinctiveness to the crown cap through a relief. We call this type ofcrown cap an “embossed crown cap”.

The embossed crown caps produced with this innovation, by being crowncaps with the desired embossment but in relief or “embossed”, hinder aneventual falsification, as occurs with the currently state of the artcrown caps. As a matter of fact, the currently state of the art crowncaps acquire the distinctiveness of the company that offers the bottledproduct sealed with this crown cap, provided only by lithographiccharacters printed in the crown caps, which are frequently and veryeasily subject to illegal reproduction.

This innovation, by allowing the production of embossed crown caps byembossing the distinctive logo in relief and not in lithography, hindersthe illegal reproduction of crown caps with unauthorized lithographiccharacters (falsified logos). Consequently, apart from avoiding theinfraction to industrial property, it will be a very useful tool toprevent easy attempts against health that occur by the alteration of thecontents of bottles that are frequently opened by unscrupulous peoplefor their adulteration and are subsequently sealed with falsified crowncaps.

It must be mentioned that the caps formed by this innovation, as we havealready indicated, can be Reinforced (Low Gauge) Crown Caps or CrownCaps with relief embossment (embossed). Moreover, this invention canshape crown caps with both characteristics, that is, reinforced crowncaps that are also embossed crown caps. This is so because bothcharacteristics are complementary to each other.

Captions of Both Dies

State of the Art CROWN Tooling 1 Holder stem of the upper cap formingpunch 2 Upper holder die 3 Upper cap forming punch 4 Upper cutting die 5Lower cutting die 6 Lower holder die 7 Forming die 8 Treader 9 Treaderholding bottle 10 Spring 11 Ejector shaft 12 Table

CROWN Tooling for Low Gauge and Embossed Caps 1 Holder stem of the uppercap forming punch 2 Upper holder die 3 Low Gauge upper cap forming punch4 Upper cutting die 5 Lower cutting die 6 Lower holder die 7 Forming die8 Treader 9 Treader holding bottle 10 Spring 11 Ejector shaft 12 Table13 Lower cap forming punch 14 Low Gauge treader 15 Lower centeringdevice 16 Shock absorber system

DESCRIPTION OF THE FIGURES

FIG. 1: Represents on the left side the currently state of the art diesand on the right the eccentric multi dies for a CROWN press tomanufacture reinforced crown caps and embossed crown caps, highlightingthe incorporated innovations.

SUMMARY

The “Crown type eccentric multi die press for manufacturing reinforcedand embossed crown caps” was specifically designed for mass productionof reinforced Low Gauge crown caps that are incorporated in theirrespective press machines; design of a special press to hold thisinnovation was not required.

Moreover, the “Crown type eccentric multi die press for manufacturingreinforced and embossed crown caps” allows the manufacture of embossedcrown caps, whose difference with the state of the art crown cap is thatthe latter has distinctive lithographic elements, of easy unauthorizedreproduction, while the characteristic of the embossed crown cap is thatits distinctive elements are embossed in relief on the crown cap, whichhinders its illegal reproduction.

1. The “Crown type eccentric multi die press for manufacturingreinforced crown caps and embossed crown caps”, characterized for havingthe following parts: a) lower system table₍₁₂₎: This element holds thelower dies secured by bolts. lower holder die₍₆₎: This element holds the“forming die”,₍₇₎ the “lower centering device”₍₁₅₎ and the lower cuttingdie₍₅₎ which cuts the circumference that will delimit the totaldevelopment of the cap. In the back part of the table, we find the“treader holding bottle”₍₉₎ held by a screw. This bottle holds the“treader”₍₈₎ whose purpose is to provide pressure during cutting andembedding. Moreover, the “treader”₍₈₎ holds inside the lower Low Gaugecap forming punch₍₁₃₎ and the “ejector shaft”₍₁₁₎ with a “shock absorbersystem”₍₁₆₎ that strips the cap once it has been formed. b) upper systemUpper cutting die₍₄₎: This element is secured to the “upper holderdie”₍₂₎. The “upper cap forming punch”₍₃₎ moves in the internal part ofthe “upper cutting die”₍₄₎ which embeds and determines the insidediameter of the cap. This cap forming punch is secured to the “holdingstem of the upper cap forming”₍₁₎.
 2. The “Crown type eccentric multidie press for manufacturing reinforced crown caps and embossed crowncaps”, according to claim 1, wherein the “treader”₍₈₎ holds the “lowercap forming punch”₍₁₃₎ that forms the low gauge reinforced capcorrugations and/or the embossed printings of the embossed crown caps.3. The “Crown type eccentric multi die press for manufacturingreinforced crown caps and embossed crown caps”, of claim 1, wherein the“shock absorber system”₍₁₆₎ increases the cap strip force, whether it isa reinforced or an embossed crown cap.
 4. The “Crown type eccentricmulti die press for manufacturing reinforced crown caps and embossedcrown caps of claim 1, wherein the “lower cap forming punch”₍₁₃₎,jointly with the “upper cap forming punch”₍₃₎ form the corrugations ofthe reinforced low gauge crown caps and/or the relief embossments of theembossed crown caps.
 5. The “Crown type eccentric multi die press formanufacturing reinforced crown caps and embossed crown caps” of claim 1,wherein the “lower cap forming punch”₍₁₃₎, jointly with the “upper capforming punch”₍₃₎, form the corrugations of the reinforced crown capsand/or the relief embossments of the embossed crown caps.
 6. The “Crowntype eccentric multi die press for manufacturing reinforced crown capsand embossed crown caps” of claim 1, wherein the “upper cap formingpunch”₍₃₎ embeds and determines the inside diameter of the reinforcedlow gauge crown caps and/or the embossed crown caps.